// Copyright (c) 2015 Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.

import * as Client from '../../utils/client.jsx';
import * as AsyncClient from '../../utils/async_client.jsx';
import crypto from 'crypto';

export default class EmailSettings extends React.Component {
    constructor(props) {
        super(props);

        this.handleChange = this.handleChange.bind(this);
        this.handleTestConnection = this.handleTestConnection.bind(this);
        this.handleSubmit = this.handleSubmit.bind(this);
        this.buildConfig = this.buildConfig.bind(this);
        this.handleGenerateInvite = this.handleGenerateInvite.bind(this);
        this.handleGenerateReset = this.handleGenerateReset.bind(this);

        this.state = {
            sendEmailNotifications: this.props.config.EmailSettings.SendEmailNotifications,
            saveNeeded: false,
            serverError: null,
            emailSuccess: null,
            emailFail: null
        };
    }

    handleChange(action) {
        var s = {saveNeeded: true, serverError: this.state.serverError};

        if (action === 'sendEmailNotifications_true') {
            s.sendEmailNotifications = true;
        }

        if (action === 'sendEmailNotifications_false') {
            s.sendEmailNotifications = false;
        }

        this.setState(s);
    }

    buildConfig() {
        var config = this.props.config;
        config.EmailSettings.EnableSignUpWithEmail = ReactDOM.findDOMNode(this.refs.allowSignUpWithEmail).checked;
        config.EmailSettings.SendEmailNotifications = ReactDOM.findDOMNode(this.refs.sendEmailNotifications).checked;
        config.EmailSettings.RequireEmailVerification = ReactDOM.findDOMNode(this.refs.requireEmailVerification).checked;
        config.EmailSettings.SendEmailNotifications = ReactDOM.findDOMNode(this.refs.sendEmailNotifications).checked;
        config.EmailSettings.FeedbackName = ReactDOM.findDOMNode(this.refs.feedbackName).value.trim();
        config.EmailSettings.FeedbackEmail = ReactDOM.findDOMNode(this.refs.feedbackEmail).value.trim();
        config.EmailSettings.SMTPServer = ReactDOM.findDOMNode(this.refs.SMTPServer).value.trim();
        config.EmailSettings.SMTPPort = ReactDOM.findDOMNode(this.refs.SMTPPort).value.trim();
        config.EmailSettings.SMTPUsername = ReactDOM.findDOMNode(this.refs.SMTPUsername).value.trim();
        config.EmailSettings.SMTPPassword = ReactDOM.findDOMNode(this.refs.SMTPPassword).value.trim();
        config.EmailSettings.ConnectionSecurity = ReactDOM.findDOMNode(this.refs.ConnectionSecurity).value.trim();

        config.EmailSettings.InviteSalt = ReactDOM.findDOMNode(this.refs.InviteSalt).value.trim();
        if (config.EmailSettings.InviteSalt === '') {
            config.EmailSettings.InviteSalt = crypto.randomBytes(256).toString('base64').substring(0, 32);
            ReactDOM.findDOMNode(this.refs.InviteSalt).value = config.EmailSettings.InviteSalt;
        }

        config.EmailSettings.PasswordResetSalt = ReactDOM.findDOMNode(this.refs.PasswordResetSalt).value.trim();
        if (config.EmailSettings.PasswordResetSalt === '') {
            config.EmailSettings.PasswordResetSalt = crypto.randomBytes(256).toString('base64').substring(0, 32);
            ReactDOM.findDOMNode(this.refs.PasswordResetSalt).value = config.EmailSettings.PasswordResetSalt;
        }

        return config;
    }

    handleGenerateInvite(e) {
        e.preventDefault();
        ReactDOM.findDOMNode(this.refs.InviteSalt).value = crypto.randomBytes(256).toString('base64').substring(0, 32);
        var s = {saveNeeded: true, serverError: this.state.serverError};
        this.setState(s);
    }

    handleGenerateReset(e) {
        e.preventDefault();
        ReactDOM.findDOMNode(this.refs.PasswordResetSalt).value = crypto.randomBytes(256).toString('base64').substring(0, 32);
        var s = {saveNeeded: true, serverError: this.state.serverError};
        this.setState(s);
    }

    handleTestConnection(e) {
        e.preventDefault();
        $('#connection-button').button('loading');

        var config = this.buildConfig();

        Client.testEmail(
            config,
            () => {
                this.setState({
                    sendEmailNotifications: config.EmailSettings.SendEmailNotifications,
                    serverError: null,
                    saveNeeded: true,
                    emailSuccess: true,
                    emailFail: null
                });
                $('#connection-button').button('reset');
            },
            (err) => {
                this.setState({
                    sendEmailNotifications: config.EmailSettings.SendEmailNotifications,
                    serverError: null,
                    saveNeeded: true,
                    emailSuccess: null,
                    emailFail: err.message + ' - ' + err.detailed_error
                });
                $('#connection-button').button('reset');
            }
        );
    }

    handleSubmit(e) {
        e.preventDefault();
        $('#save-button').button('loading');

        var config = this.buildConfig();

        Client.saveConfig(
            config,
            () => {
                AsyncClient.getConfig();
                this.setState({
                    sendEmailNotifications: config.EmailSettings.SendEmailNotifications,
                    serverError: null,
                    saveNeeded: false,
                    emailSuccess: null,
                    emailFail: null
                });
                $('#save-button').button('reset');
            },
            (err) => {
                this.setState({
                    sendEmailNotifications: config.EmailSettings.SendEmailNotifications,
                    serverError: err.message,
                    saveNeeded: true,
                    emailSuccess: null,
                    emailFail: null
                });
                $('#save-button').button('reset');
            }
        );
    }

    render() {
        var serverError = '';
        if (this.state.serverError) {
            serverError = <div className='form-group has-error'><label className='control-label'>{this.state.serverError}</label></div>;
        }

        var saveClass = 'btn';
        if (this.state.saveNeeded) {
            saveClass = 'btn btn-primary';
        }

        var emailSuccess = '';
        if (this.state.emailSuccess) {
            emailSuccess = (
                 <div className='alert alert-success'>
                    <i className='fa fa-check'></i>{'No errors were reported while sending an email.  Please check your inbox to make sure.'}
                </div>
            );
        }

        var emailFail = '';
        if (this.state.emailFail) {
            emailSuccess = (
                 <div className='alert alert-warning'>
                    <i className='fa fa-warning'></i>{'Connection unsuccessful: ' + this.state.emailFail}
                </div>
            );
        }

        return (
            <div className='wrapper--fixed'>
                <h3>{'Email Settings'}</h3>
                <form
                    className='form-horizontal'
                    role='form'
                >

                    <div className='form-group'>
                        <label
                            className='control-label col-sm-4'
                            htmlFor='allowSignUpWithEmail'
                        >
                            {'Allow Sign Up With Email: '}
                        </label>
                        <div className='col-sm-8'>
                            <label className='radio-inline'>
                                <input
                                    type='radio'
                                    name='allowSignUpWithEmail'
                                    value='true'
                                    ref='allowSignUpWithEmail'
                                    defaultChecked={this.props.config.EmailSettings.EnableSignUpWithEmail}
                                    onChange={this.handleChange.bind(this, 'allowSignUpWithEmail_true')}
                                />
                                    {'true'}
                            </label>
                            <label className='radio-inline'>
                                <input
                                    type='radio'
                                    name='allowSignUpWithEmail'
                                    value='false'
                                    defaultChecked={!this.props.config.EmailSettings.EnableSignUpWithEmail}
                                    onChange={this.handleChange.bind(this, 'allowSignUpWithEmail_false')}
                                />
                                    {'false'}
                            </label>
                            <p className='help-text'>{'When true, Mattermost allows team creation and account signup using email and password.  This value should be false only when you want to limit signup to a single-sign-on service like OAuth or LDAP.'}</p>
                        </div>
                    </div>

                    <div className='form-group'>
                        <label
                            className='control-label col-sm-4'
                            htmlFor='sendEmailNotifications'
                        >
                            {'Send Email Notifications: '}
                        </label>
                        <div className='col-sm-8'>
                            <label className='radio-inline'>
                                <input
                                    type='radio'
                                    name='sendEmailNotifications'
                                    value='true'
                                    ref='sendEmailNotifications'
                                    defaultChecked={this.props.config.EmailSettings.SendEmailNotifications}
                                    onChange={this.handleChange.bind(this, 'sendEmailNotifications_true')}
                                />
                                    {'true'}
                            </label>
                            <label className='radio-inline'>
                                <input
                                    type='radio'
                                    name='sendEmailNotifications'
                                    value='false'
                                    defaultChecked={!this.props.config.EmailSettings.SendEmailNotifications}
                                    onChange={this.handleChange.bind(this, 'sendEmailNotifications_false')}
                                />
                                    {'false'}
                            </label>
                            <p className='help-text'>{'Typically set to true in production. When true, Mattermost attempts to send email notifications. Developers may set this field to false to skip email setup for faster development.'}</p>
                        </div>
                    </div>

                    <div className='form-group'>
                        <label
                            className='control-label col-sm-4'
                            htmlFor='requireEmailVerification'
                        >
                            {'Require Email Verification: '}
                        </label>
                        <div className='col-sm-8'>
                            <label className='radio-inline'>
                                <input
                                    type='radio'
                                    name='requireEmailVerification'
                                    value='true'
                                    ref='requireEmailVerification'
                                    defaultChecked={this.props.config.EmailSettings.RequireEmailVerification}
                                    onChange={this.handleChange.bind(this, 'requireEmailVerification_true')}
                                    disabled={!this.state.sendEmailNotifications}
                                />
                                    {'true'}
                            </label>
                            <label className='radio-inline'>
                                <input
                                    type='radio'
                                    name='requireEmailVerification'
                                    value='false'
                                    defaultChecked={!this.props.config.EmailSettings.RequireEmailVerification}
                                    onChange={this.handleChange.bind(this, 'requireEmailVerification_false')}
                                    disabled={!this.state.sendEmailNotifications}
                                />
                                    {'false'}
                            </label>
                            <p className='help-text'>{'Typically set to true in production. When true, Mattermost requires email verification after account creation prior to allowing login. Developers may set this field to false so skip sending verification emails for faster development.'}</p>
                        </div>
                    </div>

                    <div className='form-group'>
                        <label
                            className='control-label col-sm-4'
                            htmlFor='feedbackName'
                        >
                            {'Notification Display Name:'}
                        </label>
                        <div className='col-sm-8'>
                            <input
                                type='text'
                                className='form-control'
                                id='feedbackName'
                                ref='feedbackName'
                                placeholder='E.g.: "Mattermost Notification", "System", "No-Reply"'
                                defaultValue={this.props.config.EmailSettings.FeedbackName}
                                onChange={this.handleChange}
                                disabled={!this.state.sendEmailNotifications}
                            />
                            <p className='help-text'>{'Display name on email account used when sending notification emails from Mattermost.'}</p>
                        </div>
                    </div>

                    <div className='form-group'>
                        <label
                            className='control-label col-sm-4'
                            htmlFor='feedbackEmail'
                        >
                            {'Notification Email Address:'}
                        </label>
                        <div className='col-sm-8'>
                            <input
                                type='email'
                                className='form-control'
                                id='feedbackEmail'
                                ref='feedbackEmail'
                                placeholder='E.g.: "mattermost@yourcompany.com", "admin@yourcompany.com"'
                                defaultValue={this.props.config.EmailSettings.FeedbackEmail}
                                onChange={this.handleChange}
                                disabled={!this.state.sendEmailNotifications}
                            />
                            <p className='help-text'>{'Email address displayed on email account used when sending notification emails from Mattermost.'}</p>
                        </div>
                    </div>

                    <div className='form-group'>
                        <label
                            className='control-label col-sm-4'
                            htmlFor='SMTPUsername'
                        >
                            {'SMTP Username:'}
                        </label>
                        <div className='col-sm-8'>
                            <input
                                type='text'
                                className='form-control'
                                id='SMTPUsername'
                                ref='SMTPUsername'
                                placeholder='E.g.: "admin@yourcompany.com", "AKIADTOVBGERKLCBV"'
                                defaultValue={this.props.config.EmailSettings.SMTPUsername}
                                onChange={this.handleChange}
                                disabled={!this.state.sendEmailNotifications}
                            />
                            <p className='help-text'>{' Obtain this credential from administrator setting up your email server.'}</p>
                        </div>
                    </div>

                    <div className='form-group'>
                        <label
                            className='control-label col-sm-4'
                            htmlFor='SMTPPassword'
                        >
                            {'SMTP Password:'}
                        </label>
                        <div className='col-sm-8'>
                            <input
                                type='text'
                                className='form-control'
                                id='SMTPPassword'
                                ref='SMTPPassword'
                                placeholder='E.g.: "yourpassword", "jcuS8PuvcpGhpgHhlcpT1Mx42pnqMxQY"'
                                defaultValue={this.props.config.EmailSettings.SMTPPassword}
                                onChange={this.handleChange}
                                disabled={!this.state.sendEmailNotifications}
                            />
                            <p className='help-text'>{' Obtain this credential from administrator setting up your email server.'}</p>
                        </div>
                    </div>

                    <div className='form-group'>
                        <label
                            className='control-label col-sm-4'
                            htmlFor='SMTPServer'
                        >
                            {'SMTP Server:'}
                        </label>
                        <div className='col-sm-8'>
                            <input
                                type='text'
                                className='form-control'
                                id='SMTPServer'
                                ref='SMTPServer'
                                placeholder='E.g.: "smtp.yourcompany.com", "email-smtp.us-east-1.amazonaws.com"'
                                defaultValue={this.props.config.EmailSettings.SMTPServer}
                                onChange={this.handleChange}
                                disabled={!this.state.sendEmailNotifications}
                            />
                            <p className='help-text'>{'Location of SMTP email server.'}</p>
                        </div>
                    </div>

                    <div className='form-group'>
                        <label
                            className='control-label col-sm-4'
                            htmlFor='SMTPPort'
                        >
                            {'SMTP Port:'}
                        </label>
                        <div className='col-sm-8'>
                            <input
                                type='text'
                                className='form-control'
                                id='SMTPPort'
                                ref='SMTPPort'
                                placeholder='E.g.: "25", "465"'
                                defaultValue={this.props.config.EmailSettings.SMTPPort}
                                onChange={this.handleChange}
                                disabled={!this.state.sendEmailNotifications}
                            />
                            <p className='help-text'>{'Port of SMTP email server.'}</p>
                        </div>
                    </div>

                    <div className='form-group'>
                        <label
                            className='control-label col-sm-4'
                            htmlFor='ConnectionSecurity'
                        >
                            {'Connection Security:'}
                        </label>
                        <div className='col-sm-8'>
                            <select
                                className='form-control'
                                id='ConnectionSecurity'
                                ref='ConnectionSecurity'
                                defaultValue={this.props.config.EmailSettings.ConnectionSecurity}
                                onChange={this.handleChange}
                                disabled={!this.state.sendEmailNotifications}
                            >
                                <option value=''>{'None'}</option>
                                <option value='TLS'>{'TLS (Recommended)'}</option>
                                <option value='STARTTLS'>{'STARTTLS'}</option>
                            </select>
                            <div className='help-text'>
                                <table
                                    className='table table-bordered'
                                    cellPadding='5'
                                >
                                    <tbody>
                                        <tr><td className='help-text'>{'None'}</td><td className='help-text'>{'Mattermost will send email over an unsecure connection.'}</td></tr>
                                        <tr><td className='help-text'>{'TLS'}</td><td className='help-text'>{'Encrypts the communication between Mattermost and your email server.'}</td></tr>
                                        <tr><td className='help-text'>{'STARTTLS'}</td><td className='help-text'>{'Takes an existing insecure connection and attempts to upgrade it to a secure connection using TLS.'}</td></tr>
                                    </tbody>
                                </table>
                            </div>
                            <div className='help-text'>
                                <button
                                    className='btn btn-default'
                                    onClick={this.handleTestConnection}
                                    disabled={!this.state.sendEmailNotifications}
                                    id='connection-button'
                                    data-loading-text={'<span class=\'glyphicon glyphicon-refresh glyphicon-refresh-animate\'></span> Testing...'}
                                >
                                    {'Test Connection'}
                                </button>
                                {emailSuccess}
                                {emailFail}
                            </div>
                        </div>
                    </div>

                    <div className='form-group'>
                        <label
                            className='control-label col-sm-4'
                            htmlFor='InviteSalt'
                        >
                            {'Invite Salt:'}
                        </label>
                        <div className='col-sm-8'>
                            <input
                                type='text'
                                className='form-control'
                                id='InviteSalt'
                                ref='InviteSalt'
                                placeholder='E.g.: "bjlSR4QqkXFBr7TP4oDzlfZmcNuH9Yo"'
                                defaultValue={this.props.config.EmailSettings.InviteSalt}
                                onChange={this.handleChange}
                                disabled={!this.state.sendEmailNotifications}
                            />
                            <p className='help-text'>{'32-character salt added to signing of email invites. Randomly generated on install. Click "Re-Generate" to create new salt.'}</p>
                            <div className='help-text'>
                                <button
                                    className='btn btn-default'
                                    onClick={this.handleGenerateInvite}
                                    disabled={!this.state.sendEmailNotifications}
                                >
                                    {'Re-Generate'}
                                </button>
                            </div>
                        </div>
                    </div>

                    <div className='form-group'>
                        <label
                            className='control-label col-sm-4'
                            htmlFor='PasswordResetSalt'
                        >
                            {'Password Reset Salt:'}
                        </label>
                        <div className='col-sm-8'>
                            <input
                                type='text'
                                className='form-control'
                                id='PasswordResetSalt'
                                ref='PasswordResetSalt'
                                placeholder='E.g.: "bjlSR4QqkXFBr7TP4oDzlfZmcNuH9Yo"'
                                defaultValue={this.props.config.EmailSettings.PasswordResetSalt}
                                onChange={this.handleChange}
                                disabled={!this.state.sendEmailNotifications}
                            />
                            <p className='help-text'>{'32-character salt added to signing of password reset emails. Randomly generated on install. Click "Re-Generate" to create new salt.'}</p>
                            <div className='help-text'>
                                <button
                                    className='btn btn-default'
                                    onClick={this.handleGenerateReset}
                                    disabled={!this.state.sendEmailNotifications}
                                >
                                    {'Re-Generate'}
                                </button>
                            </div>
                        </div>
                    </div>

                    <div className='form-group'>
                        <div className='col-sm-12'>
                            {serverError}
                            <button
                                disabled={!this.state.saveNeeded}
                                type='submit'
                                className={saveClass}
                                onClick={this.handleSubmit}
                                id='save-button'
                                data-loading-text={'<span class=\'glyphicon glyphicon-refresh glyphicon-refresh-animate\'></span> Saving Config...'}
                            >
                                {'Save'}
                            </button>
                        </div>
                    </div>

                </form>
            </div>
        );
    }
}

EmailSettings.propTypes = {
    config: React.PropTypes.object
};